动态添加textview, 实现字数限制后加符号, 以及仿微博标

字数限制后加符号

1.布局文件

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    tools:context="com.example.lenovo.mytest1708.FristActivity">

    <RelativeLayout
        android:id="@+id/ll_wenan_label_container"
        android:layout_width="match_parent"
        android:layout_height="49dp"
        android:background="@android:color/white">

        <TextView
            android:id="@+id/tv_wenan_lable_name"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_centerVertical="true"
            android:layout_marginLeft="15dp"
            android:text="参与话题"
            android:textColor="@color/text_212121"
            android:textSize="14sp"/>

        <!--标签容器-->
        <LinearLayout
            android:id="@+id/ll_wenan_label_layout"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_centerVertical="true"
            android:layout_marginRight="9dp"
            android:gravity="right"
            android:layout_toLeftOf="@+id/tv_wenan_add_label"
            android:orientation="horizontal"/>

        <TextView
            android:id="@+id/tv_wenan_add_label"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_centerVertical="true"
            android:layout_marginRight="7dp"
            android:layout_toLeftOf="@+id/iv_label_right_arrow"
            android:text="添加"
            android:textColor="@color/text_666666"
            android:textSize="14sp"/>

        <ImageView
            android:id="@+id/iv_label_right_arrow"
            android:layout_width="6dp"
            android:layout_height="12dp"
            android:layout_alignParentRight="true"
            android:layout_centerVertical="true"
            android:layout_marginRight="11dp"
            android:background="@drawable/wenan_right_arrow_icon"/>

    </RelativeLayout>

</LinearLayout>

2. 业务代码

package com.example.lenovo.mytest1708;

import android.content.Context;
import android.os.Bundle;
import android.support.v4.content.ContextCompat;
import android.support.v7.app.AppCompatActivity;
import android.text.TextUtils;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.RelativeLayout;
import android.widget.TextView;

import java.util.ArrayList;
import java.util.Collection;
import java.util.List;

import butterknife.BindView;
import butterknife.ButterKnife;

public class FristActivity extends AppCompatActivity {

    @BindView(R.id.tv_wenan_lable_name)
    TextView mTvWenanLableName;
    @BindView(R.id.ll_wenan_label_layout)
    LinearLayout mLlLabelLayout;
    @BindView(R.id.tv_wenan_add_label)
    TextView mTvAddLabel;
    @BindView(R.id.iv_label_right_arrow)
    ImageView mIvLabelRightArrow;
    @BindView(R.id.ll_wenan_label_container)
    RelativeLayout mLlWenanLabelContainer;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_frist);
        ButterKnife.bind(this);

        List<String> labelList = new ArrayList<>();

        for (int i = 0; i < 3; i++) {
            labelList.add("动态添加文本textview" + i);
        }

        showLabelView(labelList);

    }

    /**
     * 是否显示标签
     *
     * @param labelList
     */
    private void showLabelView(List<String> labelList) {

        if (!isEmpty(labelList)) {
            mLlLabelLayout.setVisibility(View.VISIBLE);
            //小于3个标签,显示添加文本
            mTvAddLabel.setVisibility(labelList.size() < 3 ? View.VISIBLE : View.GONE);
            mLlLabelLayout.removeAllViews();
            for (int i = 0; i < labelList.size(); i++) {
                TextView labelView = new TextView(this);
                //设置每个标签显示的Margins值
                LinearLayout.LayoutParams layoutParams = new LinearLayout.LayoutParams(LinearLayout.LayoutParams.WRAP_CONTENT, LinearLayout.LayoutParams.WRAP_CONTENT);
                layoutParams.setMargins(0, 0, dip2px(this, 2), 0);
                labelView.setLayoutParams(layoutParams);
                labelView.setTextColor(ContextCompat.getColor(this, R.color.text_628BEE));
                labelView.setTextSize(14);
                //SingleLine 单行显示
                labelView.setSingleLine(true);
                labelView.setEllipsize(TextUtils.TruncateAt.END);
                labelView.setId(i);
                //显示文本
                labelView.setText(labelList.get(i));

                //textview
                String symbol = "、";
                TextView symbolView = new TextView(this);
                symbolView.setTextColor(ContextCompat.getColor(this, R.color.text_628BEE));
                symbolView.setTextSize(14);
                symbolView.setText(symbol);

                //限制容器的宽度
                ViewGroup.LayoutParams lp = mLlLabelLayout.getLayoutParams();
                lp.width = dip2px(this, 230);
                mLlLabelLayout.setLayoutParams(lp);

                //分别处理1个/2个/3个标签的显示状态
                if (labelList.size() == 1) {
                    //设置最大宽度
                    labelView.setMaxWidth(dip2px(this, 166));
                    mLlLabelLayout.addView(labelView);
                } else if (labelList.size() == 2) {
                    //只允许显示6个汉字, 超出显示...
                    labelView.setMaxEms(6);
                    if (i == 0) {
                        mLlLabelLayout.addView(labelView, 0);
                        mLlLabelLayout.addView(symbolView, 1);
                    } else if (i == 1) {
                        mLlLabelLayout.addView(labelView, 2);
                    }
                } else {
                    //只允许显示4个汉字, 超出显示...
                    labelView.setMaxEms(4);
                    if (i == 0) {
                        mLlLabelLayout.addView(labelView, 0);
                        mLlLabelLayout.addView(symbolView, 1);
                    } else if (i == 1) {
                        mLlLabelLayout.addView(labelView, 2);
                        mLlLabelLayout.addView(symbolView, 3);
                    } else if (i == 2) {
                        mLlLabelLayout.addView(labelView, 4);
                    }
                }
            }
        } else {
            mLlLabelLayout.removeAllViews();
            mTvAddLabel.setVisibility(View.VISIBLE);
            mLlLabelLayout.setVisibility(View.GONE);
        }
    }

    public int dip2px(Context context, float dpValue) {
        final float scale = context.getResources().getDisplayMetrics().density;
        return (int) (dpValue * scale + 0.5f);
    }

    public <V> boolean isEmpty(Collection<V> c) {
        return (c == null || c.size() == 0);
    }
}

效果1

textview01.png

仿微博标签样式

1. 布局文件

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    tools:context="com.example.lenovo.mytest1708.FristActivity">

    <RelativeLayout
        android:layout_marginTop="10dp"
        android:id="@+id/ll_wenan_label_container"
        android:layout_width="match_parent"
        android:layout_marginLeft="15dp"
        android:layout_marginRight="15dp"
        android:layout_height="wrap_content"
        android:background="@android:color/white">

        <TextView
            android:id="@+id/tv_wenan_lable_name"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_centerVertical="true"
            android:text="内容"
            android:textColor="@color/text_212121"
            android:textSize="18sp"/>

        <!--标签容器-->
        <com.example.lenovo.mytest1708.view.AutoNewLineLayout
            android:id="@+id/ll_wenan_label_layout"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_centerVertical="true"
            android:gravity="right"
            android:layout_alignParentRight="true"
            android:orientation="horizontal"/>

    </RelativeLayout>

</LinearLayout>

2.style样式

<declare-styleable name="AutoNewLineLayout">
        <attr name="horizontalSpace" format="dimension|reference"/>
        <attr name="vertivalSpace" format="dimension|reference"/>
    </declare-styleable>

3.业务代码

package com.example.lenovo.mytest1708;

import android.content.Context;
import android.os.Bundle;
import android.support.v4.content.ContextCompat;
import android.support.v7.app.AppCompatActivity;
import android.text.TextUtils;
import android.view.View;
import android.widget.LinearLayout;
import android.widget.RelativeLayout;
import android.widget.TextView;
import android.widget.Toast;

import com.example.lenovo.mytest1708.view.AutoNewLineLayout;

import java.util.ArrayList;
import java.util.Collection;
import java.util.List;

import butterknife.BindView;
import butterknife.ButterKnife;

public class FristActivity extends AppCompatActivity {

    @BindView(R.id.tv_wenan_lable_name)
    TextView mTvWenanLableName;
    @BindView(R.id.ll_wenan_label_layout)
    AutoNewLineLayout mLlLabelLayout;
    @BindView(R.id.ll_wenan_label_container)
    RelativeLayout mLlWenanLabelContainer;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_frist);
        ButterKnife.bind(this);

        List<String> labelList = new ArrayList<>();

        for (int i = 0; i < 5; i++) {
            labelList.add("微博样式文本text" + i);
        }

        showLabelView(labelList);

    }

    /**
     * 是否显示标签
     *
     * @param labelList
     */
    private void showLabelView(List<String> labelList) {

        if (!isEmpty(labelList)) {
            mLlLabelLayout.setVisibility(View.VISIBLE);
            mLlLabelLayout.removeAllViews();
            for (int i = 0; i < labelList.size(); i++) {
                TextView labelView = new TextView(this);
                //设置每个标签显示的Margins值
                LinearLayout.LayoutParams layoutParams = new LinearLayout.LayoutParams(LinearLayout.LayoutParams.WRAP_CONTENT, LinearLayout.LayoutParams.WRAP_CONTENT);
                layoutParams.setMargins(0, 0, dip2px(this, 2), 0);
                labelView.setLayoutParams(layoutParams);
                labelView.setTextColor(ContextCompat.getColor(this, R.color.text_628BEE));
                labelView.setTextSize(14);
                //SingleLine 单行显示
                labelView.setSingleLine(true);
                labelView.setEllipsize(TextUtils.TruncateAt.END);
                labelView.setId(i);
                //标签点击事件
                final int finalI = i;
                labelView.setOnClickListener(new View.OnClickListener() {
                    @Override
                    public void onClick(View v) {
                        Toast.makeText(FristActivity.this, "点击" + finalI, Toast.LENGTH_SHORT).show();
                    }
                });
                //最多显示10个汉字
                labelView.setEms(10);
                //显示文本
                labelView.setText("#" + labelList.get(i) + "#");
                mLlLabelLayout.addView(labelView);
            }
        } else {
            mLlLabelLayout.removeAllViews();
            mLlLabelLayout.setVisibility(View.GONE);
        }
    }

    public int dip2px(Context context, float dpValue) {
        final float scale = context.getResources().getDisplayMetrics().density;
        return (int) (dpValue * scale + 0.5f);
    }

    public <V> boolean isEmpty(Collection<V> c) {
        return (c == null || c.size() == 0);
    }
}

效果2

textview02.png