一.参考 Rockchip_Developer_Guide_Dual_Display_Rotation_Direction_Debugging_CN.pdf
persist.sys.rotation.einit = 0 / 1 / 2 / 3: persist.sys.rotation.efull = false / true: 备注:当主副屏宽高比不同时,persist.sys.rotation.efull 为 false,则副屏会出现黑边, 所以这种情况,建议将 persist.sys.rotation.efull 设置为 true,些许的拉伸不会影响显示效果。
二.frameworksaseservicescorejavacomandroidserverdisplayLogicalDisplay.java
public DisplayInfo getDisplayInfoLocked() { if (mInfo == null) { mInfo = new DisplayInfo(); mInfo.copyFrom(mBaseDisplayInfo); if (mOverrideDisplayInfo != null) { mInfo.appWidth = mOverrideDisplayInfo.appWidth; mInfo.appHeight = mOverrideDisplayInfo.appHeight; mInfo.smallestNominalAppWidth = mOverrideDisplayInfo.smallestNominalAppWidth; mInfo.smallestNominalAppHeight = mOverrideDisplayInfo.smallestNominalAppHeight; mInfo.largestNominalAppWidth = mOverrideDisplayInfo.largestNominalAppWidth; mInfo.largestNominalAppHeight = mOverrideDisplayInfo.largestNominalAppHeight; mInfo.logicalWidth = mOverrideDisplayInfo.logicalWidth; mInfo.logicalHeight = mOverrideDisplayInfo.logicalHeight; mInfo.overscanLeft = mOverrideDisplayInfo.overscanLeft; mInfo.overscanTop = mOverrideDisplayInfo.overscanTop; mInfo.overscanRight = mOverrideDisplayInfo.overscanRight; mInfo.overscanBottom = mOverrideDisplayInfo.overscanBottom; mInfo.rotation = mOverrideDisplayInfo.rotation; mInfo.logicalDensityDpi = mOverrideDisplayInfo.logicalDensityDpi; mInfo.physicalXDpi = mOverrideDisplayInfo.physicalXDpi; mInfo.physicalYDpi = mOverrideDisplayInfo.physicalYDpi; } if(mDisplayId!=Display.DEFAULT_DISPLAY){ String rotation = SystemProperties.get("persist.sys.rotation.einit","0"); if(Integer.valueOf(rotation)%2!=0) { mInfo.appWidth = mPrimaryDisplayDeviceInfo.height; mInfo.appHeight = mPrimaryDisplayDeviceInfo.width; mInfo.logicalWidth = mPrimaryDisplayDeviceInfo.height; mInfo.logicalHeight=mPrimaryDisplayDeviceInfo.width; }else{ mInfo.appWidth = mPrimaryDisplayDeviceInfo.width; mInfo.appHeight = mPrimaryDisplayDeviceInfo.height; mInfo.logicalWidth = mPrimaryDisplayDeviceInfo.width; mInfo.logicalHeight=mPrimaryDisplayDeviceInfo.height; } } }
三.写了个apk 控制属性
3.1.布局
<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" android:gravity="center" tools:context="com.gatsby.systemdisplay.MainActivity" > <Button android:id="@+id/btn1" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="0" android:textSize="32sp" /> <Button android:id="@+id/btn2" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="90" android:textSize="32sp" /> <Button android:id="@+id/btn3" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="180" android:textSize="32sp" /> <Button android:id="@+id/btn4" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="270" android:textSize="32sp" /> <TextView android:id="@+id/text1" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="@string/hello_world" android:textSize="200sp" /> </LinearLayout>
3.2.code
package com.gatsby.systemdisplay; import java.io.DataInputStream; import java.io.DataOutputStream; import java.lang.reflect.Method; import android.app.Activity; import android.os.Bundle; import android.view.View; import android.view.View.OnClickListener; import android.widget.Button; import android.widget.TextView; public class MainActivity extends Activity implements OnClickListener { Button btn1, btn2, btn3, btn4; TextView text1; String rotation_einit; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); btn1 = (Button) findViewById(R.id.btn1); btn2 = (Button) findViewById(R.id.btn2); btn3 = (Button) findViewById(R.id.btn3); btn4 = (Button) findViewById(R.id.btn4); text1 = (TextView) findViewById(R.id.text1); btn1.setOnClickListener(this); btn2.setOnClickListener(this); btn3.setOnClickListener(this); btn4.setOnClickListener(this); rotation_einit = getProperty("persist.sys.rotation.einit"); text1.setText(rotation_einit); } @Override public void onClick(View v) { // TODO Auto-generated method stub switch (v.getId()) { case R.id.btn1: setProperty("persist.sys.rotation.einit", "0"); RootCommand("reboot"); break; case R.id.btn2: setProperty("persist.sys.rotation.einit", "1"); RootCommand("reboot"); break; case R.id.btn3: setProperty("persist.sys.rotation.einit", "2"); RootCommand("reboot"); break; case R.id.btn4: setProperty("persist.sys.rotation.einit", "3"); RootCommand("reboot"); break; } } @SuppressWarnings("finally") public String getProperty(String key) { String value = "unknown"; try { Class<?> c = Class.forName("android.os.SystemProperties"); Method get = c.getMethod("get", String.class, String.class); value = (String) (get.invoke(c, key, "unknown")); } catch (Exception e) { e.printStackTrace(); } finally { return value; } } public void setProperty(String key, String value) { try { Class<?> c = Class.forName("android.os.SystemProperties"); Method set = c.getMethod("set", String.class, String.class); set.invoke(c, key, value); } catch (Exception e) { e.printStackTrace(); } } public void RootCommand(String cmd) { Process process = null; DataOutputStream os = null; DataInputStream is = null; try { process = Runtime.getRuntime().exec("su"); os = new DataOutputStream(process.getOutputStream()); os.writeBytes(cmd + " "); os.writeBytes("exit "); os.flush(); int aa = process.waitFor(); is = new DataInputStream(process.getInputStream()); byte[] buffer = new byte[is.available()]; is.read(buffer); String out = new String(buffer); } catch (Exception e) { e.printStackTrace(); } finally { try { if (os != null) { os.close(); } if (is != null) { is.close(); } process.destroy(); } catch (Exception e) { } } } }