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原文:Android項目實戰(五):TextView自適應大小
對於設定TextView的字型預設大小對於UI介面的好看程度是很重要的,小螢幕設定的文字過大或者大螢幕設定的文字過小都造成UI的不美觀
現在就讓我們學習自適應大小的TextView控制項,即當文字長度變化時,文字的大小會相應的變化,保證顯示在一行當中
實現依靠於第三方類庫
第三方類來源:
https://github.com/grantland/android-autofittextview
和正常的使用TextView一樣,只需要將要自適應的TextView標籤設定為<me.grantland.widget.AutofitTextView/>
注意:一定要設定為單行,否定無法顯示效果
android:singleLine="true"
1 <me.grantland.widget.AutofitTextView 2 android:id="@+id/output_autofit" 3 android:layout_width="match_parent" 4 android:layout_height="wrap_content" 5 android:text="@string/example" 6 android:textSize="50sp" 7 android:gravity="center" 8 android:singleLine="true" 9 autofit:minTextSize="8sp"10 />
布局檔案:
1 <?xml version="1.0" encoding="utf-8"?> 2 <ScrollView xmlns:android="http://schemas.android.com/apk/res/android" 3 xmlns:autofit="http://schemas.android.com/apk/res-auto" 4 android:layout_width="match_parent" 5 android:layout_height="match_parent"> 6 <LinearLayout 7 android:layout_width="match_parent" 8 android:layout_height="wrap_content" 9 android:orientation="vertical"10 >11 <EditText12 android:id="@+id/input"13 android:layout_width="match_parent"14 android:layout_height="wrap_content"15 android:singleLine="true"16 android:hint="@string/input_hint"17 android:text="@string/example"/>18 <TextView19 android:layout_width="match_parent"20 android:layout_height="wrap_content"21 android:text="@string/label_normal"22 />23 <TextView24 android:id="@+id/output"25 android:layout_width="match_parent"26 android:layout_height="wrap_content"27 android:text="@string/example"28 android:textSize="50sp"29 android:gravity="center"30 />31 <TextView32 android:layout_width="match_parent"33 android:layout_height="wrap_content"34 android:text="@string/label_autofit"35 />36 <me.grantland.widget.AutofitTextView37 android:id="@+id/output_autofit"38 android:layout_width="match_parent"39 android:layout_height="wrap_content"40 android:text="@string/example"41 android:textSize="50sp"42 android:gravity="center"43 android:singleLine="true"44 autofit:minTextSize="8sp"45 />46 </LinearLayout>47 </ScrollView>
activity_main.xml
string.xml
1 <?xml version="1.0" encoding="utf-8"?> 2 <resources> 3 4 <string name="app_name">Texttest</string> 5 <string name="action_settings">Settings</string> 6 <string name="hello_world">Hello world!</string> 7 8 <string name="input_hint">text</string> 9 <string name="label_normal">Normal:</string>10 <string name="label_autofit">Autofit:</string>11 12 <string name="example">This is an example</string>13 14 </resources>
View Code
activity
1 package com.example.texttest; 2 3 import android.app.Activity; 4 import android.os.Bundle; 5 import android.text.Editable; 6 import android.text.TextWatcher; 7 import android.view.Menu; 8 import android.widget.EditText; 9 import android.widget.TextView;10 11 public class MainActivity extends Activity {12 13 private TextView mOutput;14 private TextView mAutofitOutput;15 @Override16 protected void onCreate(Bundle savedInstanceState) {17 super.onCreate(savedInstanceState);18 setContentView(R.layout.activity_main);19 mOutput = (TextView)findViewById(R.id.output);20 mAutofitOutput = (TextView)findViewById(R.id.output_autofit);21 22 ((EditText)findViewById(R.id.input)).addTextChangedListener(new TextWatcher() {23 @Override24 public void beforeTextChanged(CharSequence charSequence, int i, int i2, int i3) {25 // do nothing26 }27 28 @Override29 public void onTextChanged(CharSequence charSequence, int i, int i2, int i3) {30 mOutput.setText(charSequence);31 mAutofitOutput.setText(charSequence);32 }33 34 @Override35 public void afterTextChanged(Editable editable) {36 // do nothing37 }38 });39 }40 41 42 43 @Override44 public boolean onCreateOptionsMenu(Menu menu) {45 // Inflate the menu; this adds items to the action bar if it is present.46 getMenuInflater().inflate(R.menu.main, menu);47 return true;48 }49 50 }
MainActivity.java
效果:
Android項目實戰(五):TextView自適應大小